Servizio Comunitario di Informazione in materia di Ricerca e Sviluppo - CORDIS

Characterization and production of the multimode non-classical light required to improve the techniques of super-resolution below the quantum limit

Super-resolution techniques have been studied for a long time at the classical level, in the perspective of beating the Rayleigh limit of resolution by using sophisticated deconvolution procedures. Just before the beginning of the QUANTIM project, PHLAM, in collaboration with ENS, had investigated the same techniques at the quantum level, and evaluated the role of quantum noise in the deconvolution technique. They showed that it was possible to improve the performance of super-resolution techniques by injecting non-classical light in very specific transverse modes, namely the eigenmodes of the propagation through the imaging system, called prolate modes.

These investigations were pursued further during the QUANTIM project, in particular with the help of numerical simulations. PHLAM, together with its Russian sub-contractor, discovered the precise scheme of illumination of the object by a regular squeezed light source which produces the requested squeezing of the prolate modes. The simplicity of the scheme brings confidence that quantum-enhanced super-resolution technique can effectively be implemented in an actual experiment

Reported by

ENS Laboratoire Kastler Brossel
UPMC Case 74
75252 Paris